Charles albert emme



(No MOdel.)

C- A- EMME.

DOOR BELL,

Patented Jan. 7, 1890.

` Y UNITED STATES PATENT OFFICE.

CHARLES ALBERT EMME, OF IVASHINGTON, DISTRICT OF COLUMBIA.

DOOR-BELL.

SPECIFICATION forming part 0f Letters Patent No. 418,975, dated January'7, 1890.

Application filed August 16, 1889. Serial No. 320,924. (No model.)

vide for increasing the utility of the door-bell,

whereby it may be used in connection with a door-gong, a j ingle-bell,and an electric alarm, and to simplify and cheapen the construction ofthe parts. l

My improvements in the door-bell are illustrated in the accompanyingdrawings, forming part of this specification, in which the samereference-numerals indicate the same parts, and in which* Figure 1represents a vertical section of a door-post, showing the bell and itsoperating parts in side elevation; Fig. 2, a front elevation of thebell-support and the parts thereupon, showing the bell in dotted linesand illustrating the mechanism for ringing the bell by the opening of adoor, a portion of a door being shown; and Fig. 3, a perspective view ofthe post for the hammer, the hammer, and the gravitating catch for thesame.

In the drawings, the numeral 1 indicates the portion of the wall ordoor-frame upon which the bell is supported.

The bell or gong 2 is secured to the outer ond of a post 3, the innerend of which is riveted in the upper end of the base-plate orsupporting-plate 4, which is suitably secured to the wall ordoor-frames. A post 5 is secured to the lower part of the base-plate 4,

' and has a reduced or flattened outer end 6,

wardly-projecting lip13. A gravitating arm 0r catch 14 is pivotedvat itsupper end upon the other pivot 7, and has its upper portion reduced inthickness so as to bring its lower heavier end directly beneath the flatend 6 of the hammer-post 5. The reduced upper portion bears with itsforward edge against the projecting lip 13 of the hammer, and theforward edge of the lower heavier end of the catch is beveled or cut offobliquely, as shown at 15. A iiat outwardly-curved spring 16 is securedat its upper end between the shouldered inner end of the bell-post andthe baseplate 4, and bears with its lower outwardlycurved end in a notch17 in the rear edge of the upper hammer-arm a short distance above thepivot for the same.

When the bell is used as a front-door bell with a push-button, a rod 18is arranged to slide in suitable bearings 19 and 2O in the front andinner side of the door-post or wall, and the inner end of said rod isprovided with a cross bar or head 21, which may engage the gravitatingcatch, forcing it outward and slipping under it when the rod is pressedfrom the outside of the door-post. ble push-button 22 is secured uponthe forward end of said rod, and the bearing 19, upon the front side ofthe door-post, is preferably provided with a protecting-cup 23 for saidbutton. A coiled spring 24 is wrapped around said rod and bears with oneend against said rod, being inserted through a hole 25 in the same, andwith the other end against the inner end of the rear bearing 20. When itis desired to operate an electric alarm together with the bell or gong,one terminal of a wire 26 of an electric circuit is connected to thesupporting-plate 4, which is insulated from the door-post by a bindingscrew or post 27, and the other terminal wire 28 is secured to a post29, which is insulated from the supporting-plate. An arm 30, which formsone contact of the circuit-closer, projects upward from said post 29,and a spring-wire 3l forms the other contact of the circuit-closer andhas its inner end coiled around and secured to an arm 32, which projectsupward from the curve of the upper hammer-arm.

When the bell or gong is to be operated by the opening of a door, aplate or arm 33 is se- A suita- IOO cured by a screw 34 to the face ofadoor near the upper edge of the same, said screw passing through oneend of said plate or arm in such a manner that the plate may be turnedupward upbn the screw to project sufficiently far above the edge of thedoor to engage the gravitating catch of the hammer, the bell beingsecured to the lintel of the door-frame.

Said plate or arm 33 is preferably provided.

with a stud or handle 35 for convenient manipulation when it is turnedor tilted to put it out of use. A crank-arm 36 projects laterally andrearwardly from the upper hammerarm, so as to clear the Hat spring 16,and a wire 37, which is suitably carried to a jinglebell or similaralarm, is secured to the end of said crank-arm, so that said bell oralarm may be sounded at a distance at the same time when the door bellor gong is sounded.

In practice, when the device is used as a front-door bell, thepush-button is pressed inward, sliding the push-rod against the tensionof the spring. This causes the cross bar or head of said push-rod topress against the gravitating catch, forcing the sa me forward andthrough it tilting the hammer back away from the gong. When said crossbar or head has passed under said catch and released the same, the fiatspring of the hammer will force the hammer against the bell and strikethe same. The spring of the push-rod has in the meantime returned saidrod to its normal position and the cross bar or head. of said rod mayslip under the gravitating catch without interference, as said catch isfree to swing inward without tilting the hammer.

Vhen the bell is operated by the opening of the door, the plate or armupon the same acts in the same manner as the cross bar or head of thepush-rod. NVhen the electric attachment is employed, the contactspring-wire 3l will come in contact with the contact bar or arm 30,closing the circuit, when the hammer is tilted back, and on account ofthe elasticity of said spring 31 it may remain in contact during thegreater part of the backward and forward throw of the hammer, andthereby increase the certainty' and the duration of the alarm.

The fiat spring which operates the hammer will be strong and less liableto be either broken or weakened by use than the coiled or bent wiresprings usually employed in bells or gon gs of this class.

By casting the hammer-post separate from the supporting-plate it may becast with the reduced forward end and with the pivots upon the same, sothat here, as well as in all the other parts of my device, theconstruction is simple and consequently durable.

Having thus fully described the construction of the several parts of myimproved bell, its operation, and advantages, whatI claim as new is- 1.In a door-bell, the combination of a baseplate 4, a bell or gong securedto said plate, a

hammer-post 5, secured at its inner end upon said plate and cast with areduced or fiat outer end 6, having pivots 7 7 upon its faces, a hammerpivoted upon one of said pivots, having a spring 16 for forcing itagainst the bell, and having a downwardly-extending lip 13 upon theforward edge of its lower arm, a gravitating catch, having a reducedupper portion 14 pivoted upon the other pivot of said hammer-post andbearing against said lip, and having a larger lower end beveled at theforward edges, and a movable arm 33, engaging the lower end of saidcatch, substantially as described.

2. In a door-bell, the combination of the base-plate 4, the bell or gong2 upon the same, the hammer-post 5, having the fiat end 6 formed withthe pivots 7, the hammer 8 upon one of said pivots and provided with theshoulder 12 and the lip 13, the fiat spring 16, the gravitating catch14, pivoted with its reduced upper end upon the other pivot 7, andhaving the beveled enlarged lower end, and the push-rod having the crossbar or head 21,' the push-button 22, and the spring 24, substantially asdescribed.

3. In a door-bell, the combination of a baseplate, a bell or gong uponthe same, a hammer having an upwardly-projecting bar upon its upper arm,a spring-wire 31, secured with its inner end to project laterally fromsaid bar, a wire of an electric-alarm circuit se- Icured to saidbase-plate, a post projecting and insulated from said base-plate andhaving an upwardly-projecting contact-arm 30, a wire of said circuitsecured to said post, a

IOO

gravitating catch upon the hammer, and a movable arm 33, engaging theend of said catch, substantially as described.

4. In a door-bell,'the combination of a baseplate, a hammer pivoted uponsaid plate and having an upwardly-projecting bar uponA lits upper armand a gravitating latch upon its lower arm, a ymovable arm engaging saidlatch, a spring-contact wire having its end secured to the bar of saidhammer, a wire of an electric circuit connected to said baseplate, apost insulated from said plate and provided with a contact-arm, and aWire of said circuit connected to said post, substantially as described.

5. In a door-bell, the combination of a baseplate, a wire of an electriccircuit connected to the same, a hammer pivoted uponsaid plate andhaving an upwardly-extending bar and means for rocking it, aspring-contact wire having its coiled end secured to said bar, a postinsulated from said base-plate and having a con'tact-arm for saidcontact-spring, and a wire of said circuit connected to said post,substantially as described.

6. In a door-bell, the combination of a baseplate, a hammer pivoted uponsaid plate lformed with a notch in the rear side of its upper arm andwith a laterally and inwardly lextending crank arm, and provided withIOS IIO

means for rocking it, a bell-post riveted with In testimony whereof Ihave hereuntoset its inner end in said plate, a. gong upon said my handin the presence of two subsoi'lbing post, a flat spring riveted by saidpost to Witnesses.

said plate and having its free end bearing in CHARLES ALBERT EMME. saidnotch, and the Wire of a jingle-bell at- Witnesses:

taohed to said crank-arm, substantially as R. D. TRUNDLE,

described. A. E. H. JOHNSON.

